react-slick/lib/track.js

React port of slick carousel

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.Track = void 0;

var _react = _interopRequireDefault(require("react"));

var _classnames = _interopRequireDefault(require("classnames"));

var _innerSliderUtils = require("./utils/innerSliderUtils");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(source, true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(source).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

// given specifications/props for a slide, fetch all the classes that need to be applied to the slide
var getSlideClasses = function getSlideClasses(spec) {
  var slickActive, slickCenter, slickCloned;
  var centerOffset, index;

  if (spec.rtl) {
    index = spec.slideCount - 1 - spec.index;
  } else {
    index = spec.index;
  }

  slickCloned = index < 0 || index >= spec.slideCount;

  if (spec.centerMode) {
    centerOffset = Math.floor(spec.slidesToShow / 2);
    slickCenter = (index - spec.currentSlide) % spec.slideCount === 0;

    if (index > spec.currentSlide - centerOffset - 1 && index <= spec.currentSlide + centerOffset) {
      slickActive = true;
    }
  } else {
    slickActive = spec.currentSlide <= index && index < spec.currentSlide + spec.slidesToShow;
  }

  var slickCurrent = index === spec.currentSlide;
  return {
    "slick-slide": true,
    "slick-active": slickActive,
    "slick-center": slickCenter,
    "slick-cloned": slickCloned,
    "slick-current": slickCurrent // dubious in case of RTL

  };
};

var getSlideStyle = function getSlideStyle(spec) {
  var style = {};

  if (spec.variableWidth === undefined || spec.variableWidth === false) {
    style.width = spec.slideWidth;
  }

  if (spec.fade) {
    style.position = "relative";

    if (spec.vertical) {
      style.top = -spec.index * parseInt(spec.slideHeight);
    } else {
      style.left = -spec.index * parseInt(spec.slideWidth);
    }

    style.opacity = spec.currentSlide === spec.index ? 1 : 0;
    style.transition = "opacity " + spec.speed + "ms " + spec.cssEase + ", " + "visibility " + spec.speed + "ms " + spec.cssEase;
    style.WebkitTransition = "opacity " + spec.speed + "ms " + spec.cssEase + ", " + "visibility " + spec.speed + "ms " + spec.cssEase;
  }

  return style;
};

var getKey = function getKey(child, fallbackKey) {
  return child.key || fallbackKey;
};

var renderSlides = function renderSlides(spec) {
  var key;
  var slides = [];
  var preCloneSlides = [];
  var postCloneSlides = [];

  var childrenCount = _react["default"].Children.count(spec.children);

  var startIndex = (0, _innerSliderUtils.lazyStartIndex)(spec);
  var endIndex = (0, _innerSliderUtils.lazyEndIndex)(spec);

  _react["default"].Children.forEach(spec.children, function (elem, index) {
    var child;
    var childOnClickOptions = {
      message: "children",
      index: index,
      slidesToScroll: spec.slidesToScroll,
      currentSlide: spec.currentSlide
    }; // in case of lazyLoad, whether or not we want to fetch the slide

    if (!spec.lazyLoad || spec.lazyLoad && spec.lazyLoadedList.indexOf(index) >= 0) {
      child = elem;
    } else {
      child = _react["default"].createElement("div", null);
    }

    var childStyle = getSlideStyle(_objectSpread({}, spec, {
      index: index
    }));
    var slideClass = child.props.className || "";
    var slideClasses = getSlideClasses(_objectSpread({}, spec, {
      index: index
    })); // push a cloned element of the desired slide

    slides.push(_react["default"].cloneElement(child, {
      key: "original" + getKey(child, index),
      "data-index": index,
      className: (0, _classnames["default"])(slideClasses, slideClass),
      tabIndex: "-1",
      "aria-hidden": !slideClasses["slick-active"],
      style: _objectSpread({
        outline: "none"
      }, child.props.style || {}, {}, childStyle),
      onClick: function onClick(e) {
        child.props && child.props.onClick && child.props.onClick(e);

        if (spec.focusOnSelect) {
          spec.focusOnSelect(childOnClickOptions);
        }
      }
    })); // if slide needs to be precloned or postcloned

    if (spec.infinite && spec.fade === false) {
      var preCloneNo = childrenCount - index;

      if (preCloneNo <= (0, _innerSliderUtils.getPreClones)(spec) && childrenCount !== spec.slidesToShow) {
        key = -preCloneNo;

        if (key >= startIndex) {
          child = elem;
        }

        slideClasses = getSlideClasses(_objectSpread({}, spec, {
          index: key
        }));
        preCloneSlides.push(_react["default"].cloneElement(child, {
          key: "precloned" + getKey(child, key),
          "data-index": key,
          tabIndex: "-1",
          className: (0, _classnames["default"])(slideClasses, slideClass),
          "aria-hidden": !slideClasses["slick-active"],
          style: _objectSpread({}, child.props.style || {}, {}, childStyle),
          onClick: function onClick(e) {
            child.props && child.props.onClick && child.props.onClick(e);

            if (spec.focusOnSelect) {
              spec.focusOnSelect(childOnClickOptions);
            }
          }
        }));
      }

      if (childrenCount !== spec.slidesToShow) {
        key = childrenCount + index;

        if (key < endIndex) {
          child = elem;
        }

        slideClasses = getSlideClasses(_objectSpread({}, spec, {
          index: key
        }));
        postCloneSlides.push(_react["default"].cloneElement(child, {
          key: "postcloned" + getKey(child, key),
          "data-index": key,
          tabIndex: "-1",
          className: (0, _classnames["default"])(slideClasses, slideClass),
          "aria-hidden": !slideClasses["slick-active"],
          style: _objectSpread({}, child.props.style || {}, {}, childStyle),
          onClick: function onClick(e) {
            child.props && child.props.onClick && child.props.onClick(e);

            if (spec.focusOnSelect) {
              spec.focusOnSelect(childOnClickOptions);
            }
          }
        }));
      }
    }
  });

  if (spec.rtl) {
    return preCloneSlides.concat(slides, postCloneSlides).reverse();
  } else {
    return preCloneSlides.concat(slides, postCloneSlides);
  }
};

var Track =
/*#__PURE__*/
function (_React$PureComponent) {
  _inherits(Track, _React$PureComponent);

  function Track() {
    _classCallCheck(this, Track);

    return _possibleConstructorReturn(this, _getPrototypeOf(Track).apply(this, arguments));
  }

  _createClass(Track, [{
    key: "render",
    value: function render() {
      var slides = renderSlides(this.props);
      var _this$props = this.props,
          onMouseEnter = _this$props.onMouseEnter,
          onMouseOver = _this$props.onMouseOver,
          onMouseLeave = _this$props.onMouseLeave;
      var mouseEvents = {
        onMouseEnter: onMouseEnter,
        onMouseOver: onMouseOver,
        onMouseLeave: onMouseLeave
      };
      return _react["default"].createElement("div", _extends({
        className: "slick-track",
        style: this.props.trackStyle
      }, mouseEvents), slides);
    }
  }]);

  return Track;
}(_react["default"].PureComponent);

exports.Track = Track;